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![Simon Glass](/assets/img/avatar_default.png)
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Texas Instruments' K3 Error Signalling Module driver
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*
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* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
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* Tero Kristo <t-kristo@ti.com>
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*
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <asm/io.h>
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#include <dm/device_compat.h>
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#include <linux/bitops.h>
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#define ESM_SFT_RST 0x0c
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#define ESM_SFT_RST_KEY 0x0f
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#define ESM_STS(i) (0x404 + (i) / 32 * 0x20)
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#define ESM_PIN_EN_SET_OFFSET(i) (0x414 + (i) / 32 * 0x20)
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#define ESM_PIN_MASK(i) BIT((i) & 0x1f)
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static void esm_pin_enable(void __iomem *base, int pin)
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{
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/* Enable event */
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writel(ESM_PIN_MASK(pin), base + ESM_PIN_EN_SET_OFFSET(pin));
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}
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/**
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* k3_esm_probe: configures ESM based on DT data
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*
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* Parses ESM info from device tree, and configures the module accordingly.
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*/
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static int k3_esm_probe(struct udevice *dev)
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{
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int ret;
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void __iomem *base;
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int num_pins;
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u32 *pins;
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int i;
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base = dev_remap_addr_index(dev, 0);
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if (!base)
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return -ENODEV;
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num_pins = dev_read_size(dev, "ti,esm-pins");
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if (num_pins < 0) {
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dev_err(dev, "ti,esm-pins property missing or invalid: %d\n",
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num_pins);
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return num_pins;
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}
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num_pins /= sizeof(u32);
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pins = kmalloc(num_pins * sizeof(u32), __GFP_ZERO);
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if (!pins)
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return -ENOMEM;
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ret = dev_read_u32_array(dev, "ti,esm-pins", pins, num_pins);
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if (ret < 0) {
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dev_err(dev, "failed to read ti,esm-pins property: %d\n",
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ret);
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goto free_pins;
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}
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/* Clear any pending events */
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writel(ESM_SFT_RST_KEY, base + ESM_SFT_RST);
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for (i = 0; i < num_pins; i++)
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esm_pin_enable(base, pins[i]);
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free_pins:
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kfree(pins);
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return ret;
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}
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static const struct udevice_id k3_esm_ids[] = {
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{ .compatible = "ti,j721e-esm" },
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{}
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};
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U_BOOT_DRIVER(k3_esm) = {
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.name = "k3_esm",
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.of_match = k3_esm_ids,
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.id = UCLASS_MISC,
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.probe = k3_esm_probe,
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};
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